US7640427B2 - System and method for secure electronic communication in a partially keyless environment - Google Patents
System and method for secure electronic communication in a partially keyless environment Download PDFInfo
- Publication number
- US7640427B2 US7640427B2 US10/462,618 US46261803A US7640427B2 US 7640427 B2 US7640427 B2 US 7640427B2 US 46261803 A US46261803 A US 46261803A US 7640427 B2 US7640427 B2 US 7640427B2
- Authority
- US
- United States
- Prior art keywords
- server
- secure
- message
- user
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Information Transfer Between Computers (AREA)
Abstract
Description
-
- AOL Instant Messaging (AIM) from America On-Line, Inc.;
- ICQ (a protocol for locating other users on the Internet);
- Jabber, an XML-based protocol for the exchanging of messages in real-time between any two points on the Internet;
- Messaging Application Program Interface (MAPI) messages, where MAPI is a Microsoft Windows programming interface that enables e-mail to be sent from within a Windows application and documents to be attached to the e-mail; and
- Simple Object Access Protocol (SOAP), an XML-based protocol that allows activation of applications or objects within an application across networks and computer platforms (including across the Internet).
When possible and appropriate, secure server 208 further secures these protocols with the Secure Sockets Layer (SSL) protocol, as discussed below.
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- 1. Uploading/downloading of the user's private key; and
- 2. Downloading of certain administrator policies from
secure server 408 toclient machine 470.
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- 1) A local cache of certificates.
- 2) A local certificate database (e.g., a local public Lightweight Directory Access Protocol (LDAP) server).
- 3) Other secure servers, in particular a server in the Internet domain of the recipient.
Secure server 408 can, for example, use DNS mail exchange records (i.e., mail server records for a particular domain) or look for an appropriately named host for a suitable server (e.g., a host named keys.domain). - 4) Designated PGP key servers.
- 5) Public PGP key servers.
- 6) Other directories that can hold certificates
-
- 1. Return the message to the original sender
- 2. Send the message unencrypted
- 3. Add a “smart trailer” following the unencrypted text of the message, with a URL leading the recipient back to the secure server giving them a link to download an encryption client (e.g., a PGP client) or allowing them to set preferences for using secure URL e-mail.
- 4. Send a secure URL e-mail message (e.g., a Boomerang e-mail provided by PGP Corporation).
Secure URL E-Mail Message
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- 1. Use encryption to read e-mail securely on your desktop (installs an encryption client when selected)
- 2. Enter a passphrase to read e-mail from ovidbuyer.com securely on this site
- 3. Please do not encrypt e-mail to me”
-
- ldap://host:port/pgpcertid=1234567890ABCDEF, ou=PGP Keyspace, o=OrgName
Certificate Updates
- ldap://host:port/pgpcertid=1234567890ABCDEF, ou=PGP Keyspace, o=OrgName
-
- 1. Certificate expiration timeout
- 2. Account inactivity timeout
- 3. Final account inactivity timeout
-
- 1. An LDAP server running at keys.domain.com, where domain.com is the recipient's domain.
- 2. An LDAP server running on the recipient's SMTP server.
Policies
-
- Requirements on encrypting and/or signing within domains
- Search strategies
- Trusted certificates and servers
- No-certificate strategies
- Certificate management policies
- E-mail display policies
- Backup frequency, delivery, etc.
- Administrator username
- Administrator password
- Global enable/disable encryption (learn mode)
- Key generation options:
- Key size
- Key algorithm
- Expiration time—range from 1 day to no expiration, default two weeks
- Account inactivity timeout—default 1 week
- Final account inactivity timeout—default 4 months
- Whether communication with local users requires SSL/TLS or not
- What to do with a message if the recipient's certificate cannot be found—this should be configurable on a per-domain basis:
- Send in the clear
- Don't send message
- Add smart trailer
- Send a secure URL e-mail message
- When to sign a message
- Always
- Never
- When also encrypting
- What keys/certificates should be trusted by the secure server
- Add/remove per-domain and public keyservers to search for public keys
- How long to cache looked up public keys—default 24 hours
- Global exclusion list—addresses not to encrypt to
- Whether users are allowed to add per-user exclusions for mailing lists
- Number of users required to add an address to the global exclusion list
- When to decrypt messages—when the secure server receives them, or when user downloads them
- Policies for the secure server clients:
- If the secure server clients should give their private keys to the secure server
- Passphrase length
- Passphrase quality
- Key generation options (see above)
- Per-domain and public keyservers to search for public keys and certificates
- Require encryption or allow clear messages when recipient certificate cannot be found
- Exchange server TLS certificates
- Appliance network configuration—IP address, subnet, DNS name
- List of e-mail domains we manage
- Addresses of real e-mail servers:
- Incoming SMTP server to receive e-mail
- SMTP relay for outbound e-mail
- POP server
- IMAP server
- Exchange server address and port for communication
- Boomerang e-mail account expiration
- Boomerang e-mail storage quotas
- Allow boomerang recipients to select the option to not encrypt e-mail to them
- Administrator PGP key for encrypting the database backups to
- FTP server to upload backups to:
- Server address
- Login information
- Directory for backup files
- How many backups to keep
- How often to backup:
- Which days of the week
- What time to begin backup
- Whether to send an e-mail alert to the admin after successful backup, and where to send alert
- Whether to automatically install software updates, or save them for the administrator to manually install
- A field for the administrator to provide an ssh public key for shell access to the appliance
- List of other machines to send syslog messages
- E-mail address to e-mail daily logs
-
- Search the local certificate databases and revoke or delete individual keys and certificates
- View the list of downloaded software updates and install them manually
- Request SSL/TLS certificates from our CA
- Manage the Boomerang e-mail accounts
- View the list of database backups stored on the secure server and download selected backups
- Manually start a database backup
- Manually clear the local public certificate cache
- Manage the local outbound e-mail queue
- View the current secure server logs
- How to format downloaded e-mail—always plain text, always html, or based on the type of the original message
- Exclusion list—addresses not to encrypt to
- secure server TLS certificates
- secure server address and port for communication
Installation
Claims (2)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/462,618 US7640427B2 (en) | 2003-01-07 | 2003-06-17 | System and method for secure electronic communication in a partially keyless environment |
PCT/US2004/000227 WO2004063871A2 (en) | 2003-01-07 | 2004-01-07 | System and method for secure electronic communication in a partially keyless environment |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US43830203P | 2003-01-07 | 2003-01-07 | |
US10/462,618 US7640427B2 (en) | 2003-01-07 | 2003-06-17 | System and method for secure electronic communication in a partially keyless environment |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040133775A1 US20040133775A1 (en) | 2004-07-08 |
US7640427B2 true US7640427B2 (en) | 2009-12-29 |
Family
ID=32685517
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/462,618 Expired - Fee Related US7640427B2 (en) | 2003-01-07 | 2003-06-17 | System and method for secure electronic communication in a partially keyless environment |
Country Status (2)
Country | Link |
---|---|
US (1) | US7640427B2 (en) |
WO (1) | WO2004063871A2 (en) |
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Also Published As
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WO2004063871A3 (en) | 2004-10-21 |
WO2004063871A2 (en) | 2004-07-29 |
US20040133775A1 (en) | 2004-07-08 |
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